Glycerol group-containing organopolysiloxane, cosmetic, and method for producing glycerol group-containing organopolysiloxane
a technology of organopolysiloxane and glycerol group, which is applied in the field of cosmetics, and methods for producing glycerol group containing organopolysiloxane, can solve the problems of unavoidable breakage or rearrangement of siloxane chain by presence of acid or base catalyst, and achieve good durability of moist feeling
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preparation example 1
[0104]Into a reactor were taken 300 parts by mass of an amino-modified organopolysiloxane shown by the following average composition formula with viscosity of 38 mm2 / second (25° C.) and amine equivalent of 2500 g / mol,
[0105]
50 parts by mass of tetrahydrofuran, and 12 parts by mass of succinic anhydride; and then, the resulting mixture was stirred at 50° C. for 3 hours. The reaction mixture thus obtained was stripped to remove the solvent under reduced pressure at 110° C. to obtain a colorless, transparent liquid having viscosity of 550 mm2 / second (25° C.). The carboxy equivalent of this liquid was 2630 g / mol, so that it was confirmed that conversion to the amidecarboxylic acid took place.
[0106]Then, 150 parts by mass of the liquid thus obtained and 6 parts by mass of glycidol were stirred in a different reactor at 110° C. for 8 hours. The reaction mixture thus obtained was stripped to remove the unreacted substance under reduced pressure at 120° C. to obtain a pale yellow, transparen...
preparation example 2
[0108]Into a reactor were taken 200 parts by mass of an amino-modified organopolysiloxane shown by the following average composition formula with viscosity of 57 mm2 / second (25° C.) and amine equivalent of 1230 g / mol,
[0109]
20 parts by mass of tetrahydrofuran, and 16 parts by mass of succinic anhydride; and then, the resulting mixture was stirred at 50° C. for 3 hours. The reaction mixture thus obtained was stripped to remove the solvent under reduced pressure at 110° C. to obtain a colorless, transparent liquid having viscosity of 7600 mPa·s (25° C.). The carboxy equivalent of this liquid was 1340 g / mol, so that it was confirmed that conversion to the amidecarboxylic acid took place.
[0110]Then, 120 parts by mass of the liquid thus obtained, 13 parts by mass of glycidol, and 30 parts by mass of acetonitrile were stirred in a different reactor at 65° C. for 6 hours. The reaction mixture thus obtained was stripped to remove the solvent and the unreacted substance under reduced pressure...
preparation example 3
[0112]Into a reactor were taken 150 parts by mass of an amino-modified organopolysiloxane shown by the following average composition formula with viscosity of 110 mm2 / second (25° C.) and amine equivalent of 5090 g / mol,
[0113]
20 parts by mass of tetrahydrofuran, and 3 parts by mass of succinic anhydride; and then, the resulting mixture was stirred at 50° C. for 3 hours. The reaction mixture thus obtained was stripped to remove the solvent under reduced pressure at 110° C. to obtain a colorless, transparent liquid having viscosity of 1260 mPa·s (25° C.). The carboxy equivalent of this liquid was 5240 g / mol, so that it was confirmed that conversion to the amidecarboxylic acid took place.
[0114]Then, 120 parts by mass of the liquid thus obtained, 9 parts by mass of glycidol, 0.2 parts by mass of triethylamine, and 30 parts by mass of tetrahydrofurane were stirred in a different reactor at 80° C. for 6 hours. The reaction mixture thus obtained was stripped to remove the solvent and the unr...
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Abstract
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